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Preparation method of graphene metal composite material

A technology of metal composite materials and metal materials, which is applied in the field of preparation of graphene metal composite materials, can solve the problems of unsuitable industrial scale production, preparation methods that cannot meet the requirements, and expensive preparation costs, so as to achieve a uniform and flat graphene layer, which is practical Strong, low-cost effect

Active Publication Date: 2019-07-05
黑龙江碳时代石墨烯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the thermal conductivity of graphene is excellent, it is still difficult to use it in industrial applications, because the mechanical strength of pure graphene is poor, and it needs the support of matrix materials. Among them, metal substrates are a better choice. The preparation method of the composite material is not yet able to meet the requirements
One preparation method is chemical vapor deposition, which can deposit single-layer or few-layer graphene on the metal surface, which has excellent heat dissipation performance, but its preparation cost is expensive, the preparation process is complicated, and it cannot be produced on an industrial scale
Another method is to add graphene and metal powder as heat dissipation powder into the heat dissipation coating, which can also improve the heat dissipation performance, but its heat dissipation performance is poor, so it is only suitable for the coating industry

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  • Preparation method of graphene metal composite material
  • Preparation method of graphene metal composite material

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preparation example Construction

[0019] A kind of preparation method of graphene metal composite material:

[0020] Step 1: adding the graphene powder with a particle size of 100-3000 mesh into a solvent, the amount of the solvent being 10-100 times the mass of the graphene, and ultrasonically dispersing to prepare a graphene slurry;

[0021] Step 2: Apply a layer of adhesive on the surface of the clean metal material with a thickness of 3-30μm;

[0022] Step 3: Roll the graphene slurry prepared in step 1 to the side of the metal material coated with adhesive in step 2, dry the prepared material, and then send it to the rolling equipment, so that the graphene layer is combined with the adhesive Closer, and increase the compaction density of graphene, that is, to obtain graphene metal composite materials.

[0023] The graphene powder described in step 1 is one of mechanically exfoliated graphene, reduced graphene oxide, and graphene oxide, and the number of layers of graphene used is 5-100 layers.

[0024] T...

Embodiment 1

[0030] Take 10 kg of mechanically exfoliated graphene with a particle size of 100 meshes, and the number of graphene layers is 5 layers, and add 100 kg of N-methylpyrrolidone to the mechanically exfoliated graphene. For ultrasonic dispersion, the ultrasonic power is 200W, the temperature is 30°C, and the ultrasonic time is 4h. Coat a layer of heat-dissipating glue on the surface of clean 10 μm copper foil as an adhesive layer, and the coating thickness is 3 μm. Roll-coat the graphene paste onto the adhesive-coated side of the copper foil. Then it is dried, and then the dried material is sent to the rolling equipment. The pressing pressure is 200 tons, and the line speed is 2m / min, so that the graphene layer and the adhesive are combined more tightly.

Embodiment 2

[0032] Take 10 kg of mechanically exfoliated graphene with a particle size of 150 meshes, 10 layers of graphene, and add 200 kg of N,N-dimethylformamide to the mechanically exfoliated graphene. Ultrasonic dispersion, the ultrasonic power is 200W, the temperature is 90°C, and the ultrasonic time is 4h. Coat a layer of heat-dissipating glue on the surface of clean 300 μm copper foil as an adhesive layer, and the coating thickness is 30 μm. Roll-coat the graphene paste onto the adhesive-coated side of the copper foil. Then it is dried, and then the dried material is sent to the rolling equipment. The pressing pressure is 250 tons, and the line speed is 4m / min, so that the graphene layer and the adhesive are combined more tightly.

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Abstract

The invention belongs to the field of preparing of heat dissipation materials, and particularly relates to a preparation method of a graphene and metal composite. Graphene slurry is prepared by dispersing graphene into a solvent through ultrasonic treatment; the surface of a clean metal materials is coated with a layer of tackifier; the surface of the tackifier is coated with a layer of graphene slurry, and the solvent is removed, and graphene is attached to the surface of the tackifier; and then the metal material is sent to a rolling device to be pressed, graphene is bonded to metal more tightly, and the compaction density of graphene is increased. The preparation method is simple in process, and the thickness of a graphene layer of the prepared graphene and metal composite is high in controllability, and the graphene and metal composite can be produced in an industrial large-scale mode.

Description

technical field [0001] The invention relates to a preparation method of a graphene metal composite material. [0002] technical background [0003] Graphene was separated from flake graphite by a simple method in 2004. It is a new type of carbon material with a special composition of single-layer carbon atoms. The discoverer won the 2010 Nobel Prize in Physics for this reason. With the discovery of graphene, the conclusion that a single layer of atoms cannot form independent molecules was broken, causing an uproar in the scientific community. As graphene was discovered and proved to have many unique properties, based on its high electrical conductivity, ultra-high strength, and ultra-high heat dissipation performance, it has attracted the attention of scholars and experts in various industries. [0004] In terms of thermodynamics, graphene exhibits extremely excellent performance, and its average thermal conductivity is 6000W / (m·K), much higher than all currently known therm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D7/24B05D3/02B05D3/12B05D5/10
CPCB05D3/0254B05D3/12B05D5/10B05D7/14B05D7/24B05D7/542B05D2202/00B05D2451/00B05D2401/40B05D2401/50
Inventor 任睿
Owner 黑龙江碳时代石墨烯科技有限公司